LinkedIn filed its S-1 to go public. The professional networking site posted revenue of $161 million for the nine months ended Sept. 30, doubling year-over-year, and a $10 million profit versus a loss of $3.4 million during the year-ago period. Silicon Alley Insider: Where does all that money come from? Ads, tools for recruiters, and subscriptions. TechCrunch: The company’s largest shareholder is founder and chairman Reid Hoffman and his wife, Michelle Yee, owning 19 million shares, or 21.4 percent of the company. He’s followed by Sequoia Capital (16.8 million shares, or 18.9 percent), Greylock Partners (14 million shares, or 15.8 percent), and Bessemer Venture Partners (4.6 million shares, or 5.1 percent). ReadWriteWeb: In a survey we ran earlier this month, 66.04 percent of respondents said they would consider buying stock in LinkedIn — but what have the professional analysts got to say about the opportunity?